Russia’s army is massing troops and hundreds of pieces of weaponry including mobile rocket launchers, tanks and artillery at a makeshift base near the border with Ukraine, a Reuters reporter saw this week.

Many of the vehicles have number plates and identifying marks removed while many of the servicemen had taken insignia off their fatigues. As such, they match the appearance of some of the forces spotted in eastern Ukraine, which Kiev and its Western allies allege are covert Russian detachments.

The scene at the base on the Kuzminsky firing range, around 50 km (30 miles) from the border, offers some of the clearest evidence to date of what appeared to be a concerted Russian military build-up in the area.